Its listed at being preorderable on amazon nowthough to search for it you need to use the name d j a welsh insteadhttp://www.amazon.com/Matroid-Theory-D-J-Welsh/dp/0486474399/ref=sr_1_2?ie=UTF8&s=books&qid=1269580761&sr=1-2

The apparently reposted itemMatroid theory by DJA WelshWas #198, got 3 highly votes until 2/9/2010,recommended by 3 people until 6/6/2010.Posted by Anonymous at 7/09/2009 12:43:00 AM

Matroid Theory was listed as #1 on the list, which has fallen off the front page.Dover is in the process of reprinting this book, and hopefully it will see the light of day in 2010.Posted by Timothy Chow at 10/26/2009 07:54:00 PM